Reversing maple syrup evaporator

An apparatus for reversing flow of partially evaporated maple syrup in at least one evaporating pan includes a transfer line having an inlet for connected to a heating and pan for receiving partially evaporated maple syrup from the heating pan. A first sub-line extends from the transfer line and can connect to a first port of the evaporating pan(s). A second sub-line extends from the transfer line and can connected to a second port of the evaporating pan(s). A first outlet line extends from the transfer line or the first sub-line. A second outlet line extends from the transfer line or the second sub-line. When the first and second sub-lines are connected to the first and second ports respectively, the transfer line is positioned at a height no higher than the heights of the first and second ports. The first and second outlet lines are positioned at a height no higher than the transfer line. When fluid exits the evaporating pan(s) via the first or second ports, the fluid reaches the first or second outlet lines prior to reaching the transfer line.